28731134 has 4 divisors (see below), whose sum is σ = 43096704. Its totient is φ = 14365566.

The previous prime is 28731103. The next prime is 28731137. The reversal of 28731134 is 43113782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43113782 = 2 ⋅21556891.

It is a junction number, because it is equal to n+sod(n) for n = 28731097 and 28731106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28731137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7182782 + ... + 7182785.

It is an arithmetic number, because the mean of its divisors is an integer number (10774176).

Almost surely, 2^28731134 is an apocalyptic number.

28731134 is a deficient number, since it is larger than the sum of its proper divisors (14365570).

28731134 is a wasteful number, since it uses less digits than its factorization.

28731134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14365569.

The product of its digits is 4032, while the sum is 29.

The square root of 28731134 is about 5360.1430951048. The cubic root of 28731134 is about 306.2792600670.

The spelling of 28731134 in words is "twenty-eight million, seven hundred thirty-one thousand, one hundred thirty-four".